help determining what these items are... (oil leaks)

?????

 

No I meant was some more information about the engine and what you are looking for. What oil leaks coming from what to where. That is all.

Engine Overview; Figure 1: D 13 F Engine , Alternator Side ( Typical ) - Volvo D13 User Manual [Page 6]

Has some information

 

Looks like the oil separate is leaking. You might be able to take it apart and clean it up. And see if that stops it from leaking or just replace it. They are pricey but once you replace it you will good for a good while

 

Top round case in the first two pictures is the crankcase filter, and it is a replace style item if I am not mistaken. I can’t really tell about the last picture from that angle.

 

It appears to be leaking around the seams where the bolt is, so I would try to tighten up. Since it’s green, it’s original, and the bolt has the paint scratched off, so someone has removed it in the past. Try tightening it down and see if that stops it because it is a very pricey filter. There are several gaskets and o rings inside and it can be taken apart,

The third picture could be the air compressor, that’s the area it’s in. Search D13 crankcase filter or d13 crankcase separator on this site and you will get some decent info.

 

This a D13 schematic of oil separator. I know they sell a seal kit for the separator. I would reseal or replace and clean up the oil trail and see if you really do have a leak near the air compressor.